3D Earth will no longer be inhabitable?

[crimson]

For a while. The red, orange and green spheres will be activated and the yellow, blue and inidigo in potentiation. When the new 4D inhabitants become capable to hide the 4D enviroment, the yellow sphere will be activated again.

Dual activated bodies is the key in here. Since it seems 3D energy will continue until the last yellow ray body dies...(including 5d-6d wanderers since they are not dual activated). That is not too long from now (we are talking about natural death with a average life span of 70-90 years). Not many generations if we believe what apparently Q'uo said. Until then, due to electrical incompatibility, I don't see how true 4d bodies can start to form.